Alert archive / Georgia / Flash Flood Warnings in 1992

Flash Flood Warning 8, NWS Atlanta, GA

September 5, 1992Clayton County, Georgia

NWS Atlanta, GA issued this flash flood warning at Sep 5, 1992, 1:16 AM EDT for Clayton County, Georgia. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Sep 5, 1992, 1:16 AM EDT (05:16 UTC)
Expired
Sep 5, 1992, 4:15 AM EDT
In force
3 hr
Issued by
NWS Atlanta, GA
Area
Whole counties

County Clayton County, GA

The nearest sounding before it

Athens Municipal, GA (KAHN), launched 00:00Z, 5.3 hours before the alert went out and 108 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Athens Municipal, GA at 00:00Z on 1992-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1693 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Athens Municipal, GA at 00:00Z on 1992-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 97 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1693 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
748 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
97 m²/s²
0-3 km storm-relative helicity
126 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KATL 050517
FFWATL
GAC063-050815-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ATLANTA  GA
116 AM EDT SAT SEP 5 1992
 
THE NATIONAL WEATHER SERVICE IN ATLANTA  HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  400 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST GEORGIA
 
   ...NORTHERN CLAYTON COUNTY
 
AT 115 AM EDT HEAVY RAINS THAT HAD BEEN FALLING IN CLAYTON COUNTY
HAD BEGUN TO TAPER OFF. HOWEVER...COUNTY POLICE REPORTED THAT
WATER LEVELS WERE STILL RISING. FLOODING HAS BEEN REPORTED
IN SEVERAL AREAS OF THE COUNTY...ESPECIALLY IN THE NORTH.
THE FLINT RIVER MAY CONTINUE TO RISE FOR SEVERAL HOURS.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 5, 12:46 AM EDTFlash Flood WarningFFCDeKalb, Fulton5 hr

Nearby

Flash Flood Warnings in Georgia, 1992Every flash flood warning in 1992

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.